Microwave curing process and properties of T700/epoxy composites by wet filament lamination winding

doi:10.19936/j.cnki.2096-8000.20211228.014

Abstract

Abstract: In this paper, the rapid manufacturing of large-size solid rocket motor shell is the research background. Aiming at the problems of long curing cycle and high production cost in traditional heat curing, a layered microwave pre-curing process is proposed to shorten the manufacturing cycle and maintain excellent performance. With the help of differential scanning calorimeter, based on the curing degree, combined with the shell winding law and microwave absorption efficiency, the layered winding element of [90°₂/±20°] was selected. Considering the influence of heat conduction and microwave effect on the curing degree of the wound layer, a microwave pre-curing process with heating rate of 5 ℃/min and rising from room temperature to 90 ℃ was determined. The post-treatment was heat curing by holding at 160 ℃ for 1 h. Microwave curing and heat curing composite laminates and NOL rings were prepared. When the preparation time of samples cured by microwave (regardless of cooling time) is nearly half shorter than that of samples cured by heat, the mechanical properties of samples cured by microwave and heat are basically the same. Because of the bulk heating characteristics of microwave curing, it can achieve the mechanical properties equivalent to that of the heat cured samples in a short time.

Key words: solid rocket motor shell, carbon fiber composites, wet layered winding, microwave curing, heat curing, mechanical properties

CLC Number:

TB332

LI Meng-ying, XIAO Jun, HUAN Da-jun, WANG Xing-bang, YANG Xiao, JIAO Yang. Microwave curing process and properties of T700/epoxy composites by wet filament lamination winding[J]. COMPOSITES SCIENCE AND ENGINEERING, 2021, 0(12): 89-94.

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